// Copyright JS Foundation and other contributors, http://js.foundation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.


var target = Object.create(null);
var p = new Proxy(target, {
  defineProperty: function() {
    return true;
  }
});

Object.preventExtensions(p);

try {
  p.prop = null;
  assert(false)
}
catch(e)
{
  assert(e instanceof TypeError)
}
